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Using the TSC in the web (http://www.guitarscience.net/tsc/info.htm) for the Vox tone stack I noticed that the treble indeed goes way over 10k. The 100pf is normally 47pf which reduces the treble somewhat: I see a zener with a 717 ohm value. How can I measure if the zeners I used of 3v3 are...

I will box it tomorrow so I’ll know if this improves it! Thanks.

I just build the cobbler and noticed that the top range of the treble control is extremely piercing. I checked some demos on YouTube and my build is sounding comparably except for the treble knob. Since there’s no schematic yet I tried tracing the components around the B1M treble control: -...

I've noticed that Musikding has a very limited stock of colored 125B enclosures. Are there any other suppliers in the EU?

Interested in this as it’s an upcoming build for me. ;)

The other 2 preamps of which the documentation is available use 47r so I reckon the 47k is wrong? @Robert?

Great build Mike, looking forward to hear it. ;) Which wire do you use to bridge the 3PDT and the PCB?

Did it resolve the gain issue? The heavy hand side should be able to be clean and work more as a boost on lower gain settings. You’ll hear the difference between hard clipping on or off quite well. Asymm is more a feel thing where it’s a little less compressed imo

Check the values of the components, did you measure those dual and triple combined resistors? Trace the dip switches because the single Heavy Hand from AION had the asym and hard clipping reversed. The single heavy hand can go very clean because it has a clipping toggle switch next to the...

The difference between opamps is more noticable on lower gain. ;)

Cool, that must’ve been a lot of work! I like how you follow the chords in the bridge nicely in your lead part!

I recently build a Muroidea and noticed a big difference between a LM308N and a TL071. The latter sounds more open, brighter and less nasal especially on higher gain. The OP07 doesn’t need the 30pf cap BTW. Try the TL071 and see what you think. The reason I experimented with the opamp was...

I now see that @jhaneyzz mentions putting a cap over the volume pot which indeed should be a Miller cap between collector and base of Q1. I’ve used a value of 820pf or 1nf and I still keep the tone of the pedal between 0 tot 3 oc depending on the gain switch.

I personally like it at 27v and also above unity to drive the input of pedals afterward or the amp. I use the simulcast as a preamp to play pedals through it.

I’m in the Netherlands so sourced it here.

Try a lower value cap between say 500 and 1000pf. I’ve also replaced the germanium transistor with a 2n4033 which makes the response somewhat smoother and more in the direction of the Ariel Posen version.

I was wondering if you've experimented removing the red led right after the tone in the second feedback loop of the opamp? The Clay Jones overdrive that was an "inspiration" for the dumbloid only has clipping diodes in the first feedback loop: Compared to the dumbloid (Special overdrive):

Can you share a BOM for the Cobbler?

I settled on a 10k resistor instead of the 18k for the lowest value for the bass pot and I added a toggle switch that switches in a 1M resistor across the outer lugs of the 1M gain pot so I can select between high and a little less gain. It does have a small impact on the highs as well making...

I build the AION version a while ago. Compared it to a Zen drive today and it’s got too much bass IMO even on the lowest setting of the bass pot and the gain is too much too quickly. So I think I’m going to experiment with a 500k gain pot instead of 1M to get a more gradual and lower amount of...